<template>
    <div>
        <!-- 面包歇屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 提示区域 -->
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
            </el-alert>
            <!-- 步骤条区域 -->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>

            <!-- tab栏区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave"
                    @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader expand-trigger="hover" :options="catelist" :props="cateProps"
                                v-model="addForm.goods_cat" @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <!-- 渲染表单的item项 -->
                        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                            <!-- 复选框组 -->
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>

                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <!-- action表示图片要上传到的后台接口地址 -->
                        <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove"
                            list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑器组件 -->
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <!-- 添加商品按钮 -->
                        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>

        <!-- 图片预览 -->
        <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
          <img :src="previewPath" alt="" class="previewImg">
        </el-dialog>

    </div>
</template>
<script>
import _ from 'lodash'


export default {
    data() {
        return {
            activeIndex: '0',
            //添加商品的表单数据对象
            addForm: {
                goods_name: '',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                //商品所属的分类数组
                goods_cat: [],
                //图片的数组
                pics: [],
                //商品的详情描述
                goods_introduce:'',
                attrs:[]


            },
            addFormRules: {
                goods_name: [
                    { required: true, message: '请输入商品名称', trigger: 'blur' },
                ],
                goods_price: [
                    { required: true, message: '请输入商品价格', trigger: 'blur' },
                ],
                goods_weight: [
                    { required: true, message: '请输入商品重量', trigger: 'blur' },
                ],
                goods_number: [
                    { required: true, message: '请输入商品数量', trigger: 'blur' },
                ],
                goods_cat: [
                    { required: true, message: '请选择商品分类', trigger: 'blur' },

                ]

            },
            //商品分类列表
            catelist: [],
            cateProps: {
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            //动态参数列表数据
            manyTableData: [],
            //静态属性列表数据
            onlyTableData: [],
            //上传图片的URL地址
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            //图片上传组件的headers请求头对象
            headerObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            previewPath: '',
            previewVisible:false
        }

    },
    created() {
        this.getCateList()
    },
    methods: {
        //获取所有商品分类数据
        async getCateList() {
            const { data: res } = await this.$http.get('categories')
            if (res.meta.status !== 200) {
                return this.$messsge.error('获取商品分类数据失败！')
            }
            this.catelist = res.data
            console.log(this.catelist)
        },
        //级联选择器选中项变化，会触发这个函数
        handleChange() {
            console.log(this.addForm.goods_cat)
            if (this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat = []
            }
        },
        //
        beforeTabLeave(activeName, oldActiveName) {
            /* console.log('即将离开的标签页名字是：'+oldActiveName)
            console.log('即将进入的标签页名字是：'+activeName)
            return false */
            if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请先选择商品分类！')
                return false
            }
        },
        async tabClicked() {

            //console.log(this.activeIndex);
            //证明访问的是动态参数面板
            if (this.activeIndex === '1') {
                const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                    params: { sel: 'many' }
                })

                if (res.meta.status !== 200) {
                    return this.$message.error('获取动态参数列表失败!')
                }
                console.log(res.data);
                res.data.forEach(item => {
                    item.attr_vals =
                        item.attr_vals.length === 0 ? []
                            : item.attr_vals.split(' ')
                })
                this.manyTableData = res.data
            } else if (this.activeIndex === '2') {
                const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                    params: { sel: 'only' }
                })

                if (res.meta.status != 200) {
                    return this.$message.error('获取静态属性失败！')
                }
                console.log(res.data)
                this.onlyTableData = res.data
            }
        },
        //处理图片预览效果
        handlePreview(file) {
            console.log(file);
            this.previewPath = file.response.data.url
            this.previewVisible = true
        },
        //处理移除图片的操作
        handleRemove(file) {
            //console.log(file);
            //1.获取将要删除的图片的临时路径
            const filePath = file.response.data.tmp_path
            //2.从pics数组中，找到这个图片对应的索引值
            const i =
                this.addForm.pics.findIndex(x => x.pic === filePath)
            //3.调用数组的splice 方法，把图片信息对象，从pics数组中移除
            this.addForm.pics.splice(i, 1)
            console.log(this.addForm);
        },
        //监听图片上传成功的事件
        handleSuccess(response) {
            console.log(response);
            //1.拼接得到一个图片信息对象
            const picInfo = { pic: response.data.tmp_path }
            //2.将图片信息对象，push到pics数组中
            this.addForm.pics.push(picInfo)
            console.log(this.addForm);
        },
        //添加商品
        add(){
            this.$refs.addFormRef.validate(async valid =>{
                if(!valid){
                    return this.$message.error('请填写必要的表单项!')
                }
                //执行添加的业务逻辑
                //lodash   cloneDeep(obj)
                const form=_.cloneDeep(this.addForm)
                form.goods_cat= form.goods_cat.join(',')
                //处理动态参数
                this.manyTableData.forEach(item =>{
                    const newInfo={attr_id: item.attr_id,attr_value:item.attr_vals.join(' ')}
                    this.addForm.attrs.push(newInfo)
                })
                //处理静态属性
                this.onlyTableData.forEach(item =>{
                    const newInfo= {attr_id:item.attr_id,attr_value:item.attr_vals}
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs=this.addForm.attrs
                console.log(form);

                //发起请求，添加商品
                //商品的名称，必须是唯一的
               const{data:res}=await this.$http.post('goods',form)

               if(res.meta.status !==201){
                return this.$message.error('添加商品失败！')
               }
               this.$message.success('添加商品成功!')
               this.$router.push('/goods')
            })
        }
    },
    computed: {
        cateId() {
            if (this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[2]
            }
            return null
        }

    }
}
</script>

<style lang="less" scoped>
.el-checkbox {
    margin: 0 10px 0 !important;
}
.previewImg{
    width: 100%;
}
.btnAdd{
    margin-top: 15px;
}
</style>